Machine for attaching staple fasteners to cards



' G. J. BRUHN June 8, 1937.

MACHINE FOR ATTACHI NG STAPLE FASTENERS TO CARDS 2 Sheets-Sheet 1 FiledNov; 26, 1955 i jnzvezToR ATTORNE Juqe 8, 1937. J, BRQHN I 2,082,822

MACHINE FOR ATTACHING STAPLE FASTENERS T0 CARDS Filed Nov. 26, 1955 2Sheets-Sheet 2 Patented June 8, 1937 UNITED STATES ATENT OFFICE MACHINEFOR ATTACHING STAPLE FASTENERS TO CARDS George J. Bruhn, Great Neck, N.Y., assignor to Nu-Prong Fastener Corporation,

Harrison,

My invention relates to improvements in machines for attaching staplefasteners to cards and the like and is particularly adapted for use inapplying the novel form of staple fastener shown and described in myco-pending application for patent Ser. No. 46,516, filed October 24,1935.

An object of my invention is to provide means for applying and attachingstaple .fasteners to cards or the like; a further object of theinvention is to provide simple and convenient means whereby staplefasteners may be fed to a staple attaching device; a further object ofmy invention is to provide means whereby a strip of staple fasteners maybe fed to a stapling machine and staples cut therefrom and attached to acard or the like.

A preferred embodiment of the invention is illustrated in theaccompanying drawings as well as a modified form thereof.

I do not intend to confine the invention to the forms shown anddescribed as modifications and changes may be made therein withoutdeparting from the spirit of the invention.

Referring to the drawings, Figure l is a side View of a preferred formof my machine,

Figure 2 is a front view of the same,

Figure 3 is a longitudinal section of the staple carrier and adjacentparts, on the line 33 in Fig. 2, with a strip of staple fasteners inposition for use,

Figure 4 is a detail of the ram and anvil, with parts broken away, andshowing acard in position on the anvil.

Figure 5 is a side view of. a modified form of the machine,

- Figure 6 is a plan view of the base plate,

Figure 7 is a plan view of the staple carrier, Figure 8 is a section ofthe staple carrier on the line 8-8 in Figure 7,

Figure 9 is a view of the face of the ram.

Figure 10 is .a view of a strip of staples adapted for us in themachine,

Figure 11 is a sectional view of a staple attached to a card, and

Figure 12 is a view of an optional form of staple fastener.

Similar characters of reference refer to like parts throughout theseveral views.

The machine comprises a base plate I, an anvil 2, a staple carrier 3 anda hammer 4.

The staple carrier rocks on a cross-pin 5 in the standards 6, 6 andcomprises a guide bar I seated in an open channel member 8 and formingtherewith a longitudinal seat 9 for a strip of 5 staple fasteners Ill.The staple carrier 3 is mounted on the pin 5 in such manner that it willrest normally with its forward or delivery end raised or elevated toprovide space under its forward end and above the anvil 2, in whichspace there may be inserted a card or sheet of 5 material to receive thestaple as below described.

A clock spring II, coiled on apin l2 in the head 3 of the staple carrier3, carries on its free end l3, a follower block It which bears againstthe end of the strip of staples l0 and 10 presses the said strip ofstaples forward against the channeled plate i5 at the forward end of thesaid channel or seat 9. A hook or finger hold I6 is provided on theblock Hl whereby it may be drawn back against the tension of the 1,,spring H.

A flat spring guide H, on the head of the staple carrier has a free end18 which normally rests beneath and supports the end staple l9 at theforward end of the staple strip I0. 20

In the head 3 of the staple carrier 3 there is provided a ram 20 whichis normally supported in elevated position by means of coiled springs Zlcarried by brackets 22 on the head 3 of the carrier 3. The loweroperative face 25 of the ram 20 is preferably provided with a crossgroove 23 for the purpose of receiving the raised loop portion 40 of thestaple l9 and preserving its shape when the staple is inserted in a cardas hereinafter described. 30

The hammer arm 4 rocks on the pin 4 and is provided with a head 24 inwhich is seated a plunger 25 which is normally extended by a spring 25in the head 24.

The machine may be operated by power derived 35 from any source.

I have illustrated in Figures 1 and 2 a machine operated by foot power,for which purpose there is provided a treadle 21 on a lever 23 carriedby a shaft 29 on the legs or supports 31 of 40 the table on which thedevice is mounted for use. The lever 28 is normally held in elevatednon-operative position by means of a spring 32.

A link 33 connects the foot lever 28 and the hammer arm 4, whereby themachine may be 45 driven by the foot of the operator.

The device being thus assembled, the block I4 is withdrawn from thechannel member 8 and a strip of staple fasteners is inserted on theguide bar I in the channel member 8 in advance 50 of the follower blockit, which is then permitted to be drawn forward by the spring I I andpresses the strip of staple fasteners forward in the channel' member 8whereby the forward staple I9 rests against the stop l5 and below theram 20 to be inserted, is placed on the anvil 29 below the said staplel9 and in the desired location for the attachment of the staple to thecard, and the treadle 27 is depressed. The hammer arm 4 is thereby drawndown by the connecting link 33, the spring actuated rod 25 will pressupon the head of the staple carrier 3 and cause it to descend in advanceof the hammer 24 and pinch and hold the card 34 in position on the anvil2 and the head 24 of the hammer arm 4 then descends upon the ram 20which is forced down upon the staple [9, thereby cutting the said staplefrom the strip of which it forms a part, the supporting spring ll swingsout of its normal position below the staple, and the prongs of thestaple l9 are driven through the card 3d and bent over on the undersidethereof by the inclined marginal edges of the seat 35 in the anvil 2,whereby the staple is secured to the card. The pressure on the foottreadle 21 is then released and the several parts return to their normalpositions, the strip of staples Iii being advanced by the tension of thespring II, and the operation may be then repeated as may be desired.

My device is particularly adapted for use in applying to a card or otherbacking or book-cover, the form of staple fastener which forms thesubject of my co-pending application Ser. No. 46,516, above mentioned,in which there is provided a staple fastener having four prongs and araised strap or loop, as illustrated in Figures 10 and 11. For use inconnection with a staple of the type there shown, the lower operativeface of the ram 20 is provided with a cross-groove 23 whereby thepressure of the ram 28 is applied to the side marginal edges of the saidstaple so that the loop or raised strap of the staple is not disturbedbut retains its elevated position with relation to the side straps ofthe staple.

For use in attaching staple fasteners of the type illustrated in Figure12, in which there is provided on the staple an integral strap 4|, thechannel member which is indicated in the preferred form of the device as8, may be modified by providing side channels .2 for the said straps 4!,in the staple carrier or channel member.

There is shown in Figure 5 a modified form of the machine which isadapted to be operated manually. In this form of the machine, there isprovided a hand lever 36 mounted upon the head 38 of the staple carrier,and the separate hammer arm shown in the form of the machine illustratedin Figures 1 and 2 may be omitted. In this modified form of the machine,the hand lever 36 may be supported in its normal inoperative position bymeans of a spring 31 at its base. The operation of the machine, in itssaid modified form, is similar to that above described. The machine inits said modified form is adapted for use with either form of stapleillustrated. The staples being in position in the staple carrier, thehand lever 36 is depressed, thus rocking the staple carrier to depressedposition on the card to which the staple is to be attached. As the lever36 is further depressed, the hand lever 36 will descend upon the ram 20and thereby drive the staple through the card.

Having thus described my invention, what I claim is:

1. In a device of the character described, the combination of a rockingstaple carrier having a delivery end, a staple cutting ram carried bythe said delivery end of the staple carrier, spring means normallysupporting the said ram in raised position, a hammer supported above thesaid ram and spaced therefrom, means for moving the said hammer againstthe said ram, a spring actuated plunger operable between the said hammerand the staple carrier and positioned to form a contact between thedelivery end of the staple carrier and the hammer in advance of thecontact between the hammer and the said ram, and an anvil below the ramand positioned to receive the impact thereof.

2. In a device of the character described, the combination of a rockingstaple carrier having a delivery end normally elevated, a ram carried bythe delivery end of the staple carrier, spring means normally supportingthe said ram in raised position, a hammer supported above the said ramand spaced therefrom, means for moving the said hammer against the saidram, a spring actuated plunger seated in the said hammer and positionedto contact with and depress the delivery end of the staple carrier whenelevated in advance of the contact between the hammer and the ram and amember positioned to receive a blow from the ram.

3. In a device of the character described, the combination of a rockingstaple carrier having a delivery end normally elevated, means foradvancing staples on the said staple carrier, a ram carried by thedelivery end of the said staple carrier, spring means normallysupporting the said ram in raised position above the end staple whenadvanced on the said staple carrier, a hammer supported above the saidram and spaced therefrom, means for moving the said hammer against thesaid ram, and means between the said hammer and the said staple carrierwhereby the delivery end of the staple carrier is pressed down upon acard to receive staples, in advance of the contact between the hammerand the ram.

GEORGE J. BRUHN.

